I've now done two $120/750 offers using Opal op-ups. Both have posted the base points but after ten days no bonus. Yet to complain.
I suspect as they go through the epay machine which is otherwise used for gift cards which are excluded, they are also being excluded
I have previously took advantage of the additional points offer by topping up my Opal card and the transaction (both the base points and bonus points) were processed without any issue. Bear in mind that the ePay machine spats out a little docket which the operator needs to scan on the POS machine (to process the sale) so I don't think this would be an issue.